In the summer better to pay for three months at once. Otherwise your admin leaves on vacation and secretary doesn't pay for a hosting in time. Or it can be someone else responsible for a project.
Anyway, the summer is not like the autumn, neither like the winter nor the spring. The sea, the sun, vacation... Hosting is the last thing to worry about. Knowing that, we are giving to you 4 months for a price of three for dedicated servers with E3v6 CPU.